The latest data from the My Schools website shows Orange schools are falling behind the national average for literacy and numeracy.
Nine out of 16 schools in the region fell below average in last year’s NAPLAN testing, for reading, writing, spelling, grammar and punctuation and numeracy.
Yet four schools received marks that were higher than the average in all four areas, while another three schools were above average in one or more of the categories.
The My Schools website is a government website that provides information about Australian schools from students in year 3,5, 7 and 9.
However Orange principals said the data which was released this week is not accurate on its own and lacks context.
Orange Anglican Grammar principal Len Elliot had serious reservations about the quality of the data when it was used by parents to choose a school.
"It doesn't take into account the whole student and things like social learning and sport and community work. For literacy and numeracy NAPLAN is great but for everything else it doesn't come close," he said.
For more My Schools analysis see tomorrow's Central Western Daily.